What is the remainder when 7^331 is divided by 4?

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Gaurav Goel

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The answer is 3. Explanation when any multiple of 7 is divided by 4 the remainder cycle is of only two numbers i.e. when the power of 7 is odd number the remainder when it is divided by 4 would be 1 and when the power of 7 zero or even it would be 3.
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If increasing 20 by P percentage gives the same result as decreasing 60 by P percentage,What is P percentage of 70?
Increasing 20 by P% => x=20+20.P/100 Decreasing 60 by P% => y=60-60.P/100 Acoording to the question, x=y => 20+20.P/100=60-60.P/100 Solving we get P=50 So, P% of 70=50% of 70=35 So, answer is 35
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